Drop a photo here
Use the exported JPEG at the size you will upload, up to 2048 px on the long side. Nothing leaves your browser.
Free and unofficial: not affiliated with any photo-sharing site, no guarantee your photo will be accepted, and no liability for how you use the results. By using spotcheck you accept the terms.
Marks off? Drag a line or circle to move it, or erase what is not the aircraft (clouds, ground).